Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ty nang » ky nang, ty xang, ly nang
tinh va » tich va, trinh van, trinh vat
ty hang » ly hang, ty xang, thi hang
va tinh » may tinh
va cua » va chua, via cua, ca cua
tuc va » thuc va, truc va, tuc xa
ve cao » va cao, ve cac, ve co
ve bao » te bao, va bao
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty nang) or (ty hang)) ma hoi. hieu ((ve cao) OR (ve bao)) tuc va tinh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty nang) OR (ty hang)) ma hoi. hieu ((ve cao) OR (ve bao)) tuc va tinh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ty nang) or (ty hang)) ma hoi. hieu ((ve cao) OR (ve bao)) tuc va tinh va cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty nang) or (ty hang)) ma hoi. hieu ((ve cao) OR (ve bao)) tuc va tinh va cua te*.